Pany inc



Oct. 15,` 1929.

A. H. SHOEMAKER- PNEUMATICI TIRE AND RIM CONSTRUCTION Original FiledMarch 30, 1920 ATTORNEY Reissued Oct. 15, 1929 UNITED STATES PATENTOFFICE ALVIN H. SITOEMAKER, OEy SEATTLE, WASHINGTON, ASSIGNOR TOSEMITIRE COM- PANY INC., OF SEATTLE, WASHINGTON, A CORPORATION OFWASHINGTON PNEUMATICI TIRE AND EIM CONSTRUCTION Original No. 1,510,709,dated October 7, 1924, Serial No. 369,960, filed March 3G, 1920.Application for reissue filed July 15, 1926. Serial No. 122,703,

specific rim disclosed herein is used said rim y on which the tire ortread is placed being eX- `tended to. take the place of the usual sidewalls of the tire.

Another object is to provide a tire and riin structure in which the beadof the tire fits over the outside of the bead receiving portion of therim and one that is constructed in such a manner that the expansivepressure of the air within the tire will cause the bead of the tire tobe drawn tightly into contact with theA bead receiving portion of therim.

A further object is to provide a pneumatic tire and rim constructionembodying a tire that may be readily placed on a one piece circular rim.

A still further object is to provide a tire that is cheap to construct,that is durable and Wears well, and one that is Apossessed of theresilient properties required of a pneumatic tire.

A. still further object of the invention is to provide a pneumatic tireof elastic material having transversely directed cordsI imbedded thereinto provide extensibility in longitudinal directions only. f

With the above and other objects in view the invention consists in thenovel construction, adaptation and combination of parts of a tire andrim construction as will be more clearly hereinafter described andclaimed.

In the accompanying drawings Fig. 1 is a View in cross section on arelatively large scale of a tire and rim constructed in accordance withthis invention; and

Fig. 2 isa view in side elevation on a reduced scale of such tire andrim, certain parts being;V broken away to better reveal the internalconstruction of the same.

Like reference numerals designate like parts throughout the severalviews.

Referring to the drawings the numeral 5 designates a circular rim thatis adapted to be secured in any suitable manner to a wheel not shown.

The rim 5 is of substantially semicircular cross sectional shape asshown in Fig. 1 and the annular edgesof the rim are bent inwardly by arelatively sharp bend as at 6 and terminate in curved portions 7 thatare adapted to receive the overlapping bead portions 8 of a tire 10.

The tire 10 is provided with circular bead rings or cables 11 and hascords 12 that are embedded therein and preferably extend crosswise ofthe tire and at substantially right angles to the plane of such tire.

The cords 12 are preferably a single cable that is wrapped back andforth around the bead rings as shown in Fig. 1 as the tire is built upand become a part of the tire when the same is cured. Said cords extenddirectly across from one bead toy the other, and there are nolongitudinally or diagonally directed cords or fabric that will tend torestrict the tire'from longitudinal extension.

1 An air tight inner tube 13 of the usual form may be disposed withinthe rim 5 and 7 as shown and may be provided with a valve 14:.

The tire 10, as shown, is designed specilieally to be mounted upon saidspecic type of rien-and is without side walls. Said tire is similar tothe tread portion of an ordinary pneumatic tire that has its side wallsremoved` and has the bead rings l1 incorporated therein. i

The outer peripheral wailof the tire is substantially a semi-circle asseen in cross section in Fig. 1 with the center of curvature at A whilethe inner peripheral wall ,is arcuate shape 4and considerably less thana semicircle with the center of curvature at B so that the tire isrelatively thicksand heavy in the center and tapers toward the edges,

The cords 12 are embedded within the tire at a substantially constantdistance from the inner wall of such tire so that as seen in Fi l theirCenter of curvature is the point B. he rim 5 is preferably circular witha center of curvature ataA. and the tire which is lo drawn across t-heopen periphery of the rim forms a somewhat flattened side for thesemicircular air chamber within the rim.-

The bead rings 11 are endless circular me tallic cables which arepractically .rigid or 15 will expand only a very slightamount when thetireA is placed on the rim, as shown, and is iniiated. The pressure ofthe air which is equal in all directions will tend to expand the tireradially and will further tend to crowd outwardly orv swell that portionof the tire between the two bead rings l1 thus causing the bead'portions 8 of the tire to be drawn inwardly tightly against the curvedbead receiving portions 7 of the rim, thereby pre- 26 v enting anydanger'of a blow out between the t1re and rim. y

When the bead portions 8 are in engagement with the bead receivingportions 7 of the rim thecords 12, which form nonelastic 30 transversebinders, are drawnacross the open .outer portion of the rim on anarchaving a center at B so that the nonelasticI binders extending from beadtobead traverse considerably less than half of a complete circledescribed from the center B. The expansive pressure of the air withinthe tire and rim will tend to cause the non-elastic binder cords 12 toapproach an exact semi-circular shape, and, owing to theV fact that theends of such cords are held by the non-elastic bead rings 11, thispressure will tend to draw the bead portions of the tire tightly inwardagainst the bead receiving portions of the rim.

crowding one side of the rim into the tire far enough so that theopposite side of the tire may be slipped over the rim and then adjustingthe tire all around so vthat the'bead portions 8 of the'tire t thecurved beadreofceiving portions ofthe rim. y

When the tire is in use thetread portion thereof iiexes and absorbsshock like the tread portion of an ordinary pneumatic tire, such treadportion being supported by and deriving its resilience from therelatively large volume of compressed air most of which is containedwithin the rim 5.

In this tire. when used upon the specially formed rim described the sidewalls common to pneumatic tires are dispensed with and only a part thatcorresponds with and is Vsimilar to the tread portion of an ordinarytire is used, thus making a tire of this form relatively` cheap inconstruction.

From the foregoing description taken in .transverse binder but leavingsaid tire free but, while I have described the principle of v operationof the invention, together .with the deviceA which I now consider to nethe best embodiment thereof, it will be understood lthat the structureshown is merely illustrative and that such changes may be made as arewithin the scope of the following claims.

What I claim is: l 1. A tire and rim construction of the class describedembodying arigid rivm having external bead receiving portions, and atire of pliable material having non-elastic bead rings in the edgesthereof and having reinforcing means extending between said bead ringsand forming a substantially non-elastic transverse binder but leavingsaid tire-free to expandV circumferentially except for said 35 beadrings, said transverse binder, as considered on any transverse sectionof the tire, be-r ing short enough so that, when the tire is in# flated,it will form bet-Ween said bead portions an arc of less'than asemi-circle thereby causingrsaid bead portions to be drawn in- -wardlyagainst the rim. f

2. In a tire and rim construction embody. ing a tire of elastic materialhaving nonelastic bead rings in the edges thereof, reinforcing cordsextending crosswise between said bead rings and forming a substantiallyto expand longitudinally between said bead rings and arecessedrim havingbead receiving portions arrangedto fit within the bead Yportions of saidtire and hold said bead portions apart, whereby when the tire isinflated, said cords will form, between said bead bead portions ofthetire will be drawn in against the bead receiving portions of the rim.The tire may be placed on the rim by 3. A tire and rim construction ofthe class described, embodying a rim having ,spaced apart bead receivingportions, and a tire of pliable elastic materlaljhaving non-elastic beadportions arranged to rest on said bead receiving portions ofv said rimand having reinforcing means imbedded therein and extending between saidbead portions and forming ka substantially non-elastic transversebinder, b'ut leaving said tire free to stretch circumferentially exceptfor said non-elastic bead portions, said tire being` substantially lessthan a circle in cross section when said l bead portions rest onvsaidbead receivingl portionsof said rim, and said tire and said rimco-operating to form an air cavity. s

4. AV tire and rim construction of the class described, embodying arigid concave rim having spaced apart inclined bead receiving portions,and a tire of substantially semicircular cross section formed of pliableelastic material having non-elastic bead portions arrings, arcs oflessthan a semi-circle and the los ranged to be tightenedcireumferentially by internal air pressure on said bead receivingportions of said rim and having reinforcing means imbedded therein andextending between said bead ortions and, forming a suhstantially nnon-eastio transverse binder, but

' leaving said tire'free to stretch circumferi" entially except for saidnon-elastic bead por.

tions. a Signed at Seattle, Washington, this 16th day of June, 1926..ALVIN H. SHOEMAKER.

